UUTool^[1] was a freeware application written for the Apple Macintosh by Bernie Wieser. The purpose of UUTool was to uuencode and uudecode files, however, the application functionality grew to translate uLaw encoded files^[2] to AIFF format, segment large uuencoded files, and recombine multiple uuencoded files for decode.

UUTool uuencoded files and attached the .uu extension. However, UUTool was the first Macintosh program that encoded the data fork, resource fork, and finder information into one uuencoded file^[3] with the .mu extension. The format for this was to catenate the three pieces of file information and uniquely name the resource fork and finder info as files. This allowed for some interoperability on non-Macintosh platforms.

Example

begin 0700 myfile
...
end
begin 0700 .rsrc
...
end
begin 0700 .finfo
...
end

• uuencoding
• Pictures FAQ
• Center for the History of Music Theory and Literature
• BinHex
• StuffIt